A Finnish engineer Boris Adaridi designed the single-seat Adaridi AD 3 low-power aircraft and it was built at the Santahamina Aviation Wharf. The maiden flight was on April 17th, 1924. The aircraft used for evaluation purposes at Utti 1924-1931. (Ilmailumuseot.fi - Aviationmuseums.fi) [Nikon D750 + Tamron SP 24-70mm/2,8G VC]